Datasheet

Library Reference

For the quad displays, we have a special object that can handle ascii data for easy printing.

You can create the object with

There's no arguments or pins because the backpacks use the fixed I2C pins.

By default, the address is 0x70, but you can pass in the I2C address used when you initialize the display with begin

Next up, the segments can be turned on/off for each digit by writing the 'raw' bitmap you want, for example, all the

LEDs off on digit #3 is

All the segments on for digit #0 is

This is the segment map:

Adafruit_AlphaNum4 alpha4 = Adafruit_AlphaNum4();

alpha4.begin(0x70); // pass in the address

alpha4.writeDigitRaw(3, 0x0);

alpha4.writeDigitRaw(0, 0x3FFF);